Control Buzzer

I. API Introduction

The corresponding API for the buzzer is:

Arm_Buzzer_On(delay=255)

Function: Turn on the buzzer.

Parameter explanation:

delay: The input range for delay is 1~50. The larger the value, the longer the buzzer will sound. It will automatically turn off after timeout. Delay time specification: 1=100 milliseconds, 2=200 milliseconds, and so on, with the maximum delay time being 50=5 seconds. If no value is passed for delay or delay=255, it means the buzzer will sound continuously and needs to be manually turned off.
Return value: None.

Arm_Buzzer_Off()

Function: Turn off the buzzer.

Parameter explanation:

​x
No input parameters.
​
Return value: None

II. Start Docker

After entering the main board desktop, open a terminal and run the following command to start the corresponding Dofbot container:

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./Docker_Ros.sh

Then enter the following command in the Docker terminal to start jupyter-lab,

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cd
jupyter-lab --allow-root

Then enter the main board's IP address followed by :9999 in the browser,

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IP:9999         // Example: 192.168.1.11:9999

III. Code Content

Code path: /root/Dofbot/3.ctrl_Arm/2.beep.ipynb

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#!/usr/bin/env python3
#coding=utf-8
import time
from Arm_Lib import Arm_Device

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# Get the robotic arm object
Arm = Arm_Device()
time.sleep(.1)

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# Buzzer automatically sounds for 100 milliseconds then turns off
b_time = 1
Arm.Arm_Buzzer_On(b_time)
time.sleep(1)

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# Buzzer automatically sounds for 300 milliseconds then turns off
b_time = 3
Arm.Arm_Buzzer_On(b_time)
time.sleep(1)

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# Buzzer sounds continuously
Arm.Arm_Buzzer_On()
time.sleep(1)

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# Turn off the buzzer
Arm.Arm_Buzzer_Off()
time.sleep(1)

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del Arm # Release the Arm object

Open the 2.beep.ipynb file from jupyter lab, and click the "run entire notebook" button on the jupyter lab toolbar, you will hear the buzzer on the expansion board sound three times consecutively, with each subsequent sound being longer than the previous one.

It will automatically exit after running completes.